package Thread;

public class Demo2 {
    private static  int count = 0;
    public static void main(String[] args) throws InterruptedException {

        Object locker = new Object();

        Thread t1  = new Thread(()-> {
            for (int i = 0; i < 50000; i++) {
                synchronized (locker) {
                    synchronized (locker) {
                        count++;
                    }
                }
            }
        });

        Thread t2  = new Thread(()-> {
            for (int i = 0; i < 50000; i++) {
                synchronized (locker) {
                    count++;
                }
            }
        });

        t1.start();
        t2.start();

        t1.join();
        t1.join();

        System.out.println(count);
    }
}
